As much as I like the idea of my son getting into Scouts as a Wolf (which would be about 5 years off), I do have to admit that very few of the guys I was in Cubs with lasted very long in the Boy Scouts. And only 2 besides myself made it all the way to Eagle. Now, this may have little to do with them being in Cubs. Some quit after the first camping trip when they were swarmed by mosquitos. Other discovered girls in their early teens and were finished. Cub Scouting is a sufficiently different program that he who loves one may not enjoy the other.
I guess we'll have to cross that bridge when we get there...